Meetup uikit programming

João Prado Maia
Ipanema Labs, LLC
http://ipanemalabs.com
UIKit Programming (and some network stuff too)

Who?
Web programmer by day, iOS developer by night.
Consultant on iOS development projects. Contact me at http://ipanemalabs.com
Few apps on App Store since 2008.
Personal site at http://pessoal.org

Tonight’s session
Hands on
Lots of code to go through
Ask questions at any time!

Table views
Standard classes:
UINavigationController
UIViewController
UITableViewController
Goal: build a simple app with a drill down interface.

Saving data to SQLite
FMDB!
http://code.google.com/p/flycode/source/browse/trunk/fmdb
Open source wrapper on top of SQLite.
Actively maintained; easy to work with.
Goal: change previous example to load information from a SQLite database.

Dealing with an API
ASIHTTPRequest
http://allseeing-i.com/ASIHTTPRequest/
Much more convenient than NSURLConnection.
Open source; very easy to use.
Goal: modify previous example to load data from an API dynamically.

ASIHTTPRequest
Advanced features available to you in an easy to use wrapper:
Download data to memory or directly to file
Easy to upload files through POST
Automatic progress indicators for downloads/uploads
Asynchronous/Synchronous requests and persistent connections
etc
Good documentation with lots of examples

ASIHTTPRequest (2) - (IBAction)grabURL:(id)sender { NSURL *url = [NSURL URLWithString:@"http://allseeing-i.com"]; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request startSynchronous]; NSError *error = [request error]; if (!error) { NSString *response = [request responseString]; } }

ASIHTTPRequest (3) - (IBAction)grabURLInBackground:(id)sender { NSURL *url = [NSURL URLWithString:@"http://allseeing-i.com"]; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request setDelegate:self]; [request startAsynchronous]; } - (void)requestFinished:(ASIHTTPRequest *)request { // Use when fetching text data NSString *responseString = [request responseString]; // Use when fetching binary data NSData *responseData = [request responseData]; } - (void)requestFailed:(ASIHTTPRequest *)request { NSError *error = [request error]; }

JSON
JSON - JavaScript Object Notation
Serialization format much less verbose than XML
Perfect for web services that need to return information for mobile clients
iOS library: json-framework
http://code.google.com/p/json-framework/
Open source (BSD) library

JSON (2)
Serialized hash/dictionary:
{“key1”: “value1”, “key2”: “value2”}
Serialized array:
[“value1”, “value2”, “value3”]
Mixed object (array of dictionaries):
[{“name”: “Joao”, “ssn”:”12345678”}, {“name”:”Barry”, “ssn”:”98765432”}]

JSON parsing example NSArray *list; NSString *jsonString = @"["Meetup", "is", "cool"]"; list = [jsonString JSONValue]; NSLog(@"first entry: %@", [list objectAtIndex:0]); NSLog(@"second entry: %@", [list objectAtIndex:1]); NSLog(@"third entry: %@", [list objectAtIndex:2]); [json release];

Q&A
Any questions?

http://pessoal.org	1802
http://houstoniphone.com	462
http://ipanemalabs.com	47
http://beta.ipanemalabs.com	23
http://iphonehouston.com	8
http://translate.googleusercontent.com	2
http://www.iphonehouston.com	2
http://feedproxy.google.com	1
http://cache.baidu.com	1

Meetup uikit programming

by joaopmaia on Aug 20, 2010

Accessibility

Upload Details

Usage Rights

9 Embeds 2,348

Statistics

Meetup uikit programming — Presentation Transcript